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McCormack DNA .5? Do I need more power?

Hi. I have been thinking about picking up a used McCormack DNA 0.5, which I may upgrade in the future. Will it be powerful enough at only 100w? I am currently using a B&K Reference 4420 (225wpc) and while it sounds good, I am sure I will get better sound out of the McCormack, especially once upgraded. My speakers are 91db, pretty efficient, but they have a big 10" driver along with a 6.5" driver, 1" driver, and tweeter, so I don't want to under-power them. Manufacturer recommends no less than 30w. I don't play real loud (no higher than 10 o'clock, which is plenty), but I don't want the lows to be muddled by a lack of power. What do you think?
chiho

Showing 2 responses by ptmconsulting

ptmconsulting
1,000 posts
 
It's more a matter of efficiency and impediance than raw power wattage. Your speakers are pretty efficient at 91db, and I'll bet they are considered 4 ohm's. That makes the McCormack a 200 watt amp into 4 ohms.

Plenty of power there to control your woofer. The McCormack's are also known for their tight and tuneful bass, so I wouldn't think you would have a problem.

And yes, the upgrades steve offers are not to be dismissed lightly. If you like the DNA .5 in its stock form you will be amazed at a Rev A or B unit. Never to upgrade again is what most of us think of those mods.

Enjoy,
Bob
ptmconsulting
1,000 posts
 
I tried my old McCormack DNA.5 on a set of Maggie 3.5's. It sounded good, with a tighter bass than the ARC gear in the showroom. But it didn't have that tube bloom that the ARC provided and made the Maggie's sound magical. Of course the bass was plummy with the ARC gear, so that was a non starter for me also.

I've since upgraded to a DNA500 and will never lack for power, or finesse, again.
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